On Mon, 1 Feb 2021 08:14:31 -0800 Xie He wrote: > On Mon, Feb 1, 2021 at 6:10 AM Julian Wiedmann <jwi@xxxxxxxxxxxxx> wrote: > > This sounds a bit like you want skb_cow_head() ... ? > > Calling "skb_cow_head" before we call "skb_clone" would indeed solve > the problem of writes to our clones affecting clones in other parts of > the system. But since we are still writing to the skb after > "skb_clone", it'd still be better to replace "skb_clone" with > "skb_copy" to avoid interference between our own clones. Why call skb_cow_head() before skb_clone()? skb_cow_head should be called before the data in skb head is modified. I'm assuming you're only modifying "front" of the frame, right? skb_cow_head() should do nicely in that case.
